Standard camera projection views for model navigation. Attributes: TOPVIEW: View from the top of the model. BOTTOMVIEW: View from the bottom of the model. FRONTVIEW: View from the front of the model. BACKVIEW: View from the back of the model. LEFTVIEW: View from the left side of the model. RIGHTVIEW: View from the right side of the model. ISOMETRIC: Isometric projection with equal angles between axes. DIMETRIC: Dimetric projection for axonometric visualization. TRIMETRIC: Trimetric projection for axonometric visualization. FREEVIEW: Custom free camera view.